Laptop turning off when disconnected from power supply

I replaced my battery with the kit from ifixit last night and it doesn't seem to be working at all. The battery shows that it is connected but the percentage has been stuck at 0% all day. When I unplug the battery from the charger it shuts off immediately. I plugged in my swollen battery to check if my laptop was the problem but seemed to be functioning properly. Under power and battery in settings it even shows that it gained charge overnight while plugged in, but it still indicates 0% charge.